Custom SCART switcher problems

I like Ben Heck’s idea for custom a AV switch, but the CBT3244 bus switch chips don’t have enough bandwidth for analog signals. Loud audio clips and bright video blanks out. I’ve just had to go back to manually plugging in one SCART cable at a time (everything is RGB now) unless I can find a method that allows this many inputs without losing quality. It seems like using a method designed more with these issues in mind is much more complicated and maybe out of my realm of expertise.